The Best May Be Even Better: ATI Radeon HD 4870 X2 Overclocked. Page 14

New dual-chip ATI Radeon HD X2 graphics card family proved that AMD graphics division deserves to be a technology leader. Today we are going to talk about HIS HD 4870 X2 HDMI 2GB GDDR5 graphics card and will find out if overclocking helps this flagship solution to increase its performance even more.

Futuremark 3DMark Vantage

We minimize the CPU’s influence by using the Extreme profile (1920x1200, 4x FSAA and anisotropic filtering).

The Radeon HD 4870 X2 does not get any faster in 3DMark Vantage when its GPUs are overclocked by 50MHz. This must be due to the lack of memory frequency growth despite the tremendous combined bandwidth of the two GDDR5 memory banks.

It is only in the second that we can find a 2-3% growth of speed whereas the first test doesn’t show any difference. The individual tests agree with the overall scores.